Because the Father, the Son, and the Spirit are perfectly united in their essence, the three persons of the Trinity must be perfectly united both (a) in their saving intentions and (b) their saving acts. What the Father wills must be what the Son wills, and what the Son wills must be what the Spirit wills. Those whom the Father intends to save must be the same exact number as those whom the Son intends to save, and those whom the Son intends to save must be the same exact number as those whom the Spirit intends to save. And since Scripture teaches (a) that the Father has chosen to save a particular people and not all without exception, and since it teaches (b) that the Spirit will regenerate that same particular people and not all without exception, it also teaches (c) that the Son has atoned for that same particular people and not all without exception. To say otherwise is to strike at the heart of the unity of the Triune God. It is to undermine the doctrine of the Trinity, the most fundamental doctrine of Christianity. Unity in the Trinity demands a particular redemption.